New sources have come forward to speak out how truly bad it's gotten in the home of Spencer Pratt and Heidi Montag - and also claim that even Spencer's PARENTS want nothing to do with their psychotic son.

The insider says:

"He felt his parents would talk to him only about Stephanie and that they charged him with taking care of her. He thinks she's a loser and doesn't want anything to do with her. They noticed him changing two years ago and stayed by his side. But now it's too much. They even took the pictures of him out of their home."

Can U imagine even your own parents giving up on you?? Awful.

Their neighbors also are claiming that the two never leave their Pacific Palisades home, which is filled with not only useless, hoarded shiz, but also framed covers of their magazine stories!

The source continues:

"No one ever visits. Heidi sits and stares in the mirror, while Spencer plots and schemes on his projects all day. He sits on the Internet, watches TV and tries to get press. That is all he does. It's totally sick."

Agreed.

So unbelievably tragic. Even though Spencer's folks have given up on him, hopefully Heidi's family can do something to get her out of there. We think she might still have a shot!

Zayn previewed the duet by posting a black and white pic of himself with Swifty on his Instagram -- but hey, she is bestiez with his girlfriend Gigi Hadid, so it wouldn't be unusual that they hang out... But collab?!